Before Kosher slaughter of animals, there was no modern science/provable knowledge available to us today. It is a known fact that the stun gun is much less painful for life with four legs. Let us keep up with privileges Science/Technology provide us with.
17-year-old Palestinian killed by IDF on Friday laid to rest near Ramallah (Haaretz)
from the article: Jewish groups assail Polish ban on kosher slaughter